|
| Mechanistic on sulfadiazine removal from hydrolyzed urine by nano zero-valent iron activated periodate |
| Received:January 22, 2025 |
| View Full Text View/Add Comment Download reader |
| KeyWord:periodate;nanoscale zero-valent iron;hydrolyzed urine;sulfadiazine;high-valent metal |
| Author Name | Affiliation | E-mail | | ZHANG Haolong | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | | | FANG Guodong | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | DAI Jing | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | daij@issas.ac.cn | | ZHAO Yuan | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | zhaoyuan@cczu.edu.cn |
|
| Hits: 1630 |
| Download times: 611 |
| Abstract: |
| Periodate-based advanced oxidation processes（PI-AOPs）showed efficient elimination efficiency towards organic pollutants. To explore efficient degradation technologies for antibiotic pollutants, this study investigated the treatment efficiency and mechanisms of sulfadiazine（SDZ）degradation by nanoscalezero-valentiron（nZVI）activated periodate（PI）oxidation processes. The results demonstrate that nZVI/PI system achieved a faster SDZ removal rate（0.09 h-1）compared with nZVI/PS system. The presence of HCO3- and NH4+ in urine significantly inhibited the degradation of SDZ, while Cl- had a negligible effect. Active species identification experiments indicated that high-valent iron[Fe（Ⅳ）] and iodate radical（·IO3）collectively drived the removal of SDZ from urine. Mass spectrometry indicates that SDZ decomposes through pathways such as pyrimidine ring opening, S—N bond cleavage, C—N bond cleavage, and molecular rearrangement.Product analysis revealed that major degradation products exhibited significantly lower ecological toxicity compared to the parent compound, demonstrating the environmental friendliness of nZVI/PI. |
|
|
|
